三轴压缩试验中橡皮膜约束影响的校正

Corrections for influence of membrane restraint in triaxial test

基于风化砂的三轴压缩试验,讨论了橡皮膜约束对土强度的影响。结果表明橡皮膜的约束力随试样的径向应变的增大而增大,橡皮膜的约束将使测得的无粘性土的排水强度偏大。在此基础上提出了一种校正橡皮膜约束的比较简易的方法。

Based on the triaxial compression tests of weathered sand,discussed in this paper was the influence of rubber membrane on strength of soil.The results show that the influence of rubber membrane increases with the increase of radial strain of sampling,which results in the values of measured drain strength greater than that of actuality.Moreover,a kind of simpler and more convenient method for correction of the influence of rubber membrane on strength of soil was presented.